In the 802.1 X protocol, you must have () to complete the user authentication and authorization.
(Multiple choice)

If an enterprise wireless network networking mode is direct forwarding, the thin AP can convert the 802.11 data packet into an Ethernet packet, and then encapsulate the packet into a CAPWAP encapsulation and transmit the data packet to the AC through the CAPWAP tunnel.

Among the following options, what are the reasons why the AP can't be online? (Multiple choice)

Which of the following channels are overlapping channels in WLAN 2.4 GHz band?

In the wireless network deployment scenario, when the AC is configured as "Layer 3 Networking + by hang Mode + Direct Forwarding", where can the wireless user's gateway be located? (Multiple choice)